Grate construction



:Aug. 11, 1931. R. B. PARKER 1,818,744

, I GRATE CONSTRUCTION Y 7 Filed Dec. 14, 1 2 Sheets-Sheet 2 Patented Aug. 11, 193 1 "UNITED STATES TRUSTEE, on NEW YORK; .1\T. Y.

GRATE consrnucrron "A lication filed Decemberl l, i92s..:seria1 no. 154,698.

A further ob ect of the invention is the construction of a combination grate struc-.

ture and gas distributing boxes, having a .1 suitable support therefor.

' Another object of the invention s the provision of an apparatus for supplying gas to these boxes.

These and many other ObJects which w ll become apparent as the descriptlon proceeds,

- are sought and obtained by the principles in.-

volved in the construction to be described hereinafter.

This invention resides substantially in the construction, combination, arrangement relative location of parts as will be described in this specification. v

Referring to the drawings in which the same reference numerals will be used in the several views to indicate the same parts, Figure 1 is a plan'view of the grate showing several parts to which this inventlon does not relate; I

Figure 2 is a vertical cross-sectional V ew of '35 the grate structure mounted within the retort.

Figure 3 is a side elevational view-of a grate-bar mounted on one of the gas boxes,

which is shown in cross-sectional View. I

Figure 4 is a cross-sectional view of a grate barand an enlarged side elevational view of one end of the grate bar. 7

In many processes for the treatment of materials within a retort it has been found desirable to supply a suitable gas or evenv a '45 liquid to some'particular part of the fuel bed,

. or at times to the whole fuel bed to increase the efliciency of the process. For one instance of this reference may be madeto the process of treating carbonaceous materials of all kinds by a heat treatment to extract there-.

PATENT 1 oFFIcE RICHARD B. rARxEIt, or sxANEArELEs EW YORK, AssIGNonrro smears. AnBY,

from the Volatile constituents. .A complete process of this nature and the apparatus for carrying it out has beendisclosed' in my copending applications, Serial Nos. 154,694v and 154,695, filed respectively, on December 14, 1926 and December 14', 1926.

3 Referring to Figure 1, the base of the retort in which the grate is mounted has been shown at- 1. A top plan view of the: grate 2 is shown over the surface of which the cutter bar 3 is operated by means ofthe oscillating carriages This movement of the carriages isaccomplished by means of the worm wheels 5, driven through the shaft 6 and the gear 7. The cutter bar mechanism forms no part ofthis invention as it has been fullycovered in the above mentioned applications. It is, of. course, t-o be understood that theparticular grate and box construction disclosed herein :is adapted, andin} tendedito beused in any retort. F .Referringl'to Figure 2, there is shownextending across the grate chamber the supporting beams 8 on which are mounted-a plurality of gasjor distributing boxes '9 V which areeach divided into smaller sections .by -theinternal walls 10. Passages 11 "are provided in the walls andthe top. of, the

boxes. A series of short pipes12, one for each of the boxes-is connected to the main pipe 13. In connection with this piping sysinserted in the pipes l2 and inthepipe 13,

'tem, itmay-be stated that valves 20' may be I at suitable points to provide means for Y controlling the admission of gasto any or all of the boxes. These valvesyhave not been shown for the sakeof simplicity, but their application to this invention is at once apparentto those. skilled in; the art. Thegrate structure proper comprises a; plurality of "grate bars 2, which areof triangular crosssection and hollow. At-the apex of the grate bars or distributed along the. top thereof. is a series of small openings 14 through which the gas may-be delivered tothe fuel bed.

Each of the grate bars is provided near its end with, the projection 2 which are spaced apart {a distance e ual; to thelength ofthe gas boxes to provi e a means for centering the bars on the grate boxes. In Figure 2,

a small section of the hopper 15 has been shown supported beneath the grate structure, but this forms no part of the present invention.

The operation of this arangement will be apparent from the foregoing description, but it may be stated that any suitable gas. or even an inflammable liquid could be supplied through the pi e 13 to anyone of thegas boxes and distri uted therefrom throughthe openings in the boxes and grate bars to any point in the fuel bed. By supplying an in flammable gas or liquid to the heated materials on the grate, it will be seen that the burning or oxidizing action may be controlled. 1 However, this is no part of the present invention. I

I am aware, of course, that many changes in the details of construction and relative arrangement of parts will readily occur to those skilled in this art, and I do not, therefore, desire to be limited to the particular construction shown for purposes of illustration, but rather to any structure embodying the principles of this invention which will come within the terms of the appended claims.

What I seek to secure by United States Letters Patent is:

1. In a grate structure for supporting a bed of solid fuel the combination with a plurality of hollow bars of V-cross section having openings in the walls and projections at the base thereof of a plurality of boxes, having openings therein, for supporting said bars, said projections being arranged to center the bars on the boxes and means for distributing a gas to said boxes,

the gas flowing from said boxes and through said bars into the fuel bed.

2. In a grate structure for supporting a bed of solid fuel the combination with a plurality of hollow bars open at the bottom and having holes in the walls thereof near the top, of a. plurality of boxes supported under said bars and having a plurality of holes in the tops thereof,'conduits connecting said boxes to a feed line and means in said conboxes through which gas may be delivered to and through said boxes and bars and into a fuel bed on said bars.

5. A grate construction for supporting a bed of solid fuel comprising in combination a plurality of grate bars of V-cross section having openings in the walls thereof, a plurality of boxes having openings in the top thereof, said bars being supported in inverted position on said boxes, and means for distributing a gas through said boxes and bars to any desired area of the grate.

In testimony whereof I have hereunto set my hand on this 11th day of December, A. D.,

RICHARD B. PARKER.

duits for controlling the area of'delivery of gas to the grate. 1

3. In a grate structure for supporting a bed of solid fuel the combination with a plurality of hollow bars open at the bottom and having holes in the walls thereof near the top, of a plurality of boxes supported under said bars and having aplurality of holes in the tops thereof, a pipe leading from each of said boxes and a conduit leading to each of said pipes.

4. In a grate constructlon of the type described, the combination witha plurality of grate bars arranged to support a bed of solid fuel, said barshaving openings therethrough of a plurality of apertured boxes arranged to support said bars and pipe connections to said 

